It is perfectly possible to recognise that what for one person is wonderful and everything they ever wanted, for another one is horrifying and something they wouldn't touch with a bargepole, without either of them feeling insulted.
Many of the reasons people want children are exactly the reasons I don't want them. I don't go around telling people with children how terrifying the idea of having a person completely dependent on me is, and how happy I am I never chose to have them for that reason, because there is no need. I only mention it in conversations like this one, where there is a debate and both sides are explained as part of the conversation. Within a debate, this is what you do, right? A mother can say here that she would feel lonely, and unfulfilled without children, and that she would find that life sad and hopeless. I wouldn't feel angry or offended if she did, that's her truth and how she would feel. She is not saying that MY life is sad and unfulfilled, and lacking purpose. She is saying HERS would be if she had my life. Mine would be utter hell if I had hers. Having kids would be an utter nightmare to me. But that does not make HER life a nightmare. It really is not that hard to understand. Or maybe it is, seeing some of the comments here. It goes back to what i explained on my first post here, the inability of some people to have a theory of mind where others can have different wishes and desires. And recognising that other's wishes and desires do not change their own in any way.
My sister has children, she always wanted them and she loves being a mum. I think it's wonderful, and I would have really hurt for her if she had not been able to have them, because I love her and I want her to be happy. At the same time, when I'm with her and her children are being stroppy, or when they get sick, or when they chase her all around the house screaming "mummy mummy!" I silently congratulate myself that I am not living that life. That life that SHE LOVES. Because I am different, and I would hate that life. I don't hate her, I love her kids. I just don't want her life. Hell, i WORK with mums and babies. I love babies. I love interacting with them, helping mums transition into motherhood. I love cuddling newborn babies... and then give them back, and come back to my quiet, lovely house.
There is no contradiction. Neither my sister nor I feel angry with one another because we feel attacked by the fact the other person chose a radically different life. Neither of us are jealous of the other. We accept that each one of us would hate having the life of the other. We both have the brain capacity to understand this implicitly. I wish everyone had it too.